70 (number)

70 (seventy) is the natural number following 69 and preceding 71.

List of numbers — Integers << 70 71 72 73 74 75 76 77 78 79 >>
Cardinal	seventy
Ordinal	70th (seventieth)
Numeral system
Factorization	<math>2 \cdot 5 \cdot 7<math>
Divisors	2, 5, 7, 10, 14, 35
Roman numeral	LXX
Binary	1000110
Hexadecimal	46

Mathematics

70 is a Pell number and a Harshad number. Its factorization makes it a sphenic number. It is the seventh pentagonal number and the fourth 13-gonal number. It is the smallest weird number.

Other fields

70 is:

• the atomic number of ytterbium, a lanthanide.
• the designation of USA Interstate 70, a freeway that goes from Utah to Maryland.
• In miles per hour, a common speed limit for freeways in many American states.
• In years of marriage, the platinum wedding anniversary
• The registry of the U.S. Navy's nuclear aircraft carrier USS Carl Vinson (CVN-70), named after U.S. Representative Carl Vinson.
• The number of the French department Haute-Saône.
• The number of elders assembled by Moses on God's command in the desert (Holy Bible, Numbers 11:16-30).
• The year AD 70, 70 BC, or 1970.